code.delx.au - pulseaudio/blob - src/pulsecore/cli.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <stdlib.h>
  30
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/ioline.h>
  34 #include <pulsecore/module.h>
  35 #include <pulsecore/sink.h>
  36 #include <pulsecore/source.h>
  37 #include <pulsecore/client.h>
  38 #include <pulsecore/sink-input.h>
  39 #include <pulsecore/source-output.h>
  40 #include <pulsecore/tokenizer.h>
  41 #include <pulsecore/strbuf.h>
  42 #include <pulsecore/namereg.h>
  43 #include <pulsecore/cli-text.h>
  44 #include <pulsecore/cli-command.h>
  45 #include <pulsecore/log.h>
  46
  47 #include "cli.h"
  48
  49 #define PROMPT ">>> "
  50
  51 struct pa_cli {
  52     pa_core *core;
  53     pa_ioline *line;
  54
  55     void (*eof_callback)(pa_cli *c, void *userdata);
  56     void *userdata;
  57
  58     pa_client *client;
  59
  60     int fail, kill_requested, defer_kill;
  61 };
  62
  63 static void line_callback(pa_ioline *line, const char *s, void *userdata);
  64 static void client_kill(pa_client *c);
  65
  66 pa_cli* pa_cli_new(pa_core *core, pa_iochannel *io, pa_module *m) {
  67     char cname[256];
  68     pa_cli *c;
  69     assert(io);
  70
  71     c = pa_xmalloc(sizeof(pa_cli));
  72     c->core = core;
  73     c->line = pa_ioline_new(io);
  74     assert(c->line);
  75
  76     c->userdata = NULL;
  77     c->eof_callback = NULL;
  78
  79     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  80     c->client = pa_client_new(core, __FILE__, cname);
  81     assert(c->client);
  82     c->client->kill = client_kill;
  83     c->client->userdata = c;
  84     c->client->owner = m;
  85
  86     pa_ioline_set_callback(c->line, line_callback, c);
  87     pa_ioline_puts(c->line, "Welcome to PulseAudio! Use \"help\" for usage information.\n"PROMPT);
  88
  89     c->fail = c->kill_requested = c->defer_kill = 0;
  90
  91     return c;
  92 }
  93
  94 void pa_cli_free(pa_cli *c) {
  95     assert(c);
  96     pa_ioline_close(c->line);
  97     pa_ioline_unref(c->line);
  98     pa_client_free(c->client);
  99     pa_xfree(c);
 100 }
 101
 102 static void client_kill(pa_client *client) {
 103     pa_cli *c;
 104     assert(client && client->userdata);
 105     c = client->userdata;
 106
 107     pa_log_debug(__FILE__": CLI client killed.");
 108     if (c->defer_kill)
 109         c->kill_requested = 1;
 110     else {
 111         if (c->eof_callback)
 112             c->eof_callback(c, c->userdata);
 113     }
 114 }
 115
 116 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 117     pa_strbuf *buf;
 118     pa_cli *c = userdata;
 119     char *p;
 120     assert(line && c);
 121
 122     if (!s) {
 123         pa_log_debug(__FILE__": CLI got EOF from user.");
 124         if (c->eof_callback)
 125             c->eof_callback(c, c->userdata);
 126
 127         return;
 128     }
 129
 130     buf = pa_strbuf_new();
 131     assert(buf);
 132     c->defer_kill++;
 133     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 134     c->defer_kill--;
 135     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 136     pa_xfree(p);
 137
 138     if (c->kill_requested) {
 139         if (c->eof_callback)
 140             c->eof_callback(c, c->userdata);
 141     } else
 142         pa_ioline_puts(line, PROMPT);
 143 }
 144
 145 void pa_cli_set_eof_callback(pa_cli *c, void (*cb)(pa_cli*c, void *userdata), void *userdata) {
 146     assert(c);
 147     c->eof_callback = cb;
 148     c->userdata = userdata;
 149 }